Title:
【発明の名称】磁気懸垂装置
Document Type and Number:
Japanese Patent JPH11512032
Kind Code:
A
Abstract:
A suspension system for magnetically suspending an object O comprises an electromagnetic coil L having an axially extending core 13 of magnetically permeable material and a permanent magnet 14 disposed on its axis. A permanent magnet 10 is also provided in the object O and is arranged such that it is in attraction with the permanent magnet 14 on the coil L, and with the magnetically permeable core 13 so that the object O is suspended at a position below the coil L by the attractive force. Sensors 15,16 on the coil L detect the magnetic field of the permanent magnet 10 in the object O, and provide signals to a control circuit, which applies current to the coil L to attract the object O when the detected field is below a predetermined limit and to repel the object when the detector field is above a predetermined limit. In this manner, the object O is held in position using a relatively low current, since the coil L is only energised when the object moves away from the position in which it is held by the field of the permanent magnets 10,14.
Inventors:
Shirazie, Nabir
Application Number:
JP51095297A
Publication Date:
October 19, 1999
Filing Date:
September 02, 1996
Export Citation:
Assignee:
Magnetic Suspensions (Ireland) Limited
International Classes:
F16C39/06; B25J15/06; (IPC1-7): B25J15/06
Attorney, Agent or Firm:
Akihiko Umeda